Published December 2011
Increasing oil recovery of reservoirs being under long-term development through the application of microbiological impact method
Z. B. MirzajanovWater cut method in the practice of oil fields development has an important place as an artificial impact method. However, there is still a large volume of oil in reservoir following the water cut method. Enhancement of this method is provided for reducing surplus oil saturation in reservoir. Application of microbiological impact method has been commenced recently in order to increase oil recovery of fields being under long-term operation and water-cut fields. This method is distinguished from others with simplicity of application, ecological cleanness and not requiring great capital investments. The article deals with some outcomes of applying the method in Balakhani Imishli - Sabunchu - Ramana field. The horizon was injected with 250 t active slime and 44.5 t molasses brought from sugar plant through injector well in selected area, the well was kept closed for 2 weeks for incubation period and this time pressure increase from 0.05 to 0.5 Mpa was observed. Increase of daily oil flow rate in production wells took place. 109 t of additional oil was recovered in total from 8 production wells around the injector well during the last 5 months. Currently the process is continued.
